EP0095111A2 - Cylindre de coulée avec un manteau refroidi isothermiquement - Google Patents

Cylindre de coulée avec un manteau refroidi isothermiquement Download PDF

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Publication number
EP0095111A2
EP0095111A2 EP83104755A EP83104755A EP0095111A2 EP 0095111 A2 EP0095111 A2 EP 0095111A2 EP 83104755 A EP83104755 A EP 83104755A EP 83104755 A EP83104755 A EP 83104755A EP 0095111 A2 EP0095111 A2 EP 0095111A2
Authority
EP
European Patent Office
Prior art keywords
roll
radial
drain
axial
feed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83104755A
Other languages
German (de)
English (en)
Other versions
EP0095111A3 (fr
Inventor
Robert Allen Ramser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcoa Corp
Original Assignee
Aluminum Company of America
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aluminum Company of America filed Critical Aluminum Company of America
Publication of EP0095111A2 publication Critical patent/EP0095111A2/fr
Publication of EP0095111A3 publication Critical patent/EP0095111A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel

Definitions

  • the present invention relates to an apparatus for the continuous casting of metals in strip form and, more particularly, to a new and improved roll caster providing substantially isothermal cooling of the casting roll's shell.
  • U.S. Patent 2,850,776 to Hunter discloses a roller for continuous casting machines having a plurality of helical coolant channels. Each coolant channel's helical, single convolution construction allows the coolant flowing in each channel only one revolution. The patent states that this arrangement permits the equal exposure of the coolant in all the channels to the shell of the roller and the uniform extraction of heat from the roller's shell.
  • the Hunter patent states that a slight temperature gradient is present from one end of the roller to the other during the casting process as well as states that this temperature gradient has no noticeable effect on roller operation.
  • U.S. Patent 4,074,750 to Beghin discloses an internally cooled roll having two coaxial trunnions and a cylindrical body.
  • the internally cooled roll could have a plurality of cylindrical longitudinal conduits evenly spaced about the axis of the cylindrical body in an annular arrangement with a tubular conduit located in each longitudinal conduit, or could have a singular annular longitudinal conduit having either tubular conduits evenly spaced within the singular annular longitudinal conduit or a single tube coaxially located within the singular annular longitudinal conduit, or could have a cylindrical longitudinal conduit with a tubular conduit coaxially located within the cylindrical longitudinal conduit.
  • Cooling fluid is circulated through the conduits and the means for supplying the cooling fluid to one of the conduits and removing the cooling fluid from the other conduit include a fluid collector element in a passage in one of the trunnions.
  • U.S. Patent 3,757,847 to Sofinsky et al. describes a roll mould with a cooling system.
  • Each roller has a shaft within a sleeve, a central bore, circular passageways and radial passageways.
  • a header is provided in the central bore to divide the radial passageways into separate sections; one part for supplying cooling fluid and the other part for draining cooling fluid.
  • the patent states that uniform heat removal from the hot metal over the length and height of the crystallization zone is achieved since coolant of the same temperature and in a constant amount is supplied to the cooling system.
  • U.S. Patent 2,790,216 to Hunter discloses a cooling system in rollers for the continuous casting of metal.
  • Each roller has a core and a shell over the core.
  • the core's surface has longitudinal channels whose ends are in communication with annular grooves and radiating passages intersect the annular grooves.
  • the roller has a central bore, which is counterbored. Through the counterbore there is extended a conduit forming an inner passageway communicating with the central bore. Coolant flows through the counterbore and then proceeds in an outwardly direction through one set of radiating passages to the longitudinal channels. The coolant flow continues through the longitudinal channels returning through another set of radiating passages to the central bore, the conduit extending through the counterbore and a return pipe.
  • British Patent Specification 897,412 discloses a cooling system for casting rolls.
  • Each casting roll has a core and over the core is a sleeve.
  • the longitudinal inlet and longitudinal outlet channels communicate with the core's periphery by means of small channels. These small channels open into annular grooves at the core's periphery. Coolant enters through the longitudinal inlet channels and flows upwardly to the annular grooves through the connecting smaller channels. The coolant then flows through the annular grooves and exits the annular grooves through those smaller channels which connect to the longitudinal outlet channels.
  • British Patent Specification 1,319,185 describes an internally cooled roller.
  • Each casting roller is hollow and is mounted on two hollow shafts.
  • the first hollow shaft serves as an inlet for the coolant and the second hollow shaft serves to discharge the coolant.
  • the first hollow shaft communicates with a plurality of pipes radially disposed in the roller.
  • Each radially disposed pipe communicates with a horizontal pipe appropriately spaced within the roller.
  • the horizontal pipes have nozzles to spray the coolant at the roller's inner surface.
  • the coolant is discharged from the casting roller by the second hollow shaft.
  • the second hollow shaft extends centrally within the casting roller and has perforations through which the coolant can be discharged.
  • the objective of the present invention is to provide a new and improved roll caster for use in an apparatus for the continuous casting of metal in strip form whereby substantially isothermal cooling is provided to the casting roll's shell.
  • Two important objectives for a cooling system for casting rolls are: first, to reduce the thermal axial camber on the casting rolls resulting from the molten metal contacting the casting rolls; and second, to provide substantially uniform heat removal from the molten metal as it contacts the casting rolls to promote the production of high quality metal in strip form.
  • Thermal axial camber may cause variations in the casting gap, that is the gap between a pair of parallel casting rolls in a roll caster, which may result in unacceptable gauge variations in the cooled and solidified metal.
  • substantially isothermal cooling is provided to the casting roll's shell so the casting roll's shell surface temperature will be substantially constant and little or no thermal axial camber will be present in either the roll necks or the shell of the casting roll.
  • thermal axial camber on the casting roll is greatly reduced, the casting gap remains substantially constant, and substantially uniform heat removal from the molten metal contacting the casting roll's shell is provided.
  • Prior art cooling rolls have not as efficiently or effectively met these objectives since either temperature variations are present around the casting roll's shell caused by the coolant temperature's rise as the coolant circulates through the cooling system or thermal axial camber develops in the casting roll's necks or shell caused by one-half on the casting roll running at a warmer temperature than the other one-half of the casting roll as the coolant circulates through the cooling system. In some cases, both temperature variations around the casting roll's shell and thermal axial camber are present during operation of the cooling system.
  • An important advantage of the isothermal shell cooling method of the present invention is that the rate of coolant flow and the degree of temperature rise of the coolant as it circulates through the cooling system are not considered to be critical.
  • a casting roll for use in a roll caster for continuous casting of metals in strip form, said casting roll comprising a roll and a shell therearound characterized by at least one axial feed bore for supplying cooling fluid into the roll and at least one axial drain bore for draining cooling fluid from the roll, a plurality of parallel annular grooves around the roll for flow of cooling fluid between the roll and the shell, a plurality of radial feed passageways connecting each axial feed bore to the annular grooves and a plurality of radial drain passageways connecting each axial drain bore to the annular grooves with each of said radial feed and radial drain passageways servicing at least one groove and with the radial feed passageway connected to the groove on the generally opposite side of the roll from the radial drain passageway for the same groove and with each radial feed passageway extending radially outwardly from an axial feed bore in a direction generally opposite from each immediately adjacent radial feed passageway and with each radial drain passageway extending radi
  • the invention also provides a roll caster for continuous casting of metals in strip form which comprises a pair of such casting rolls spaced slightly apart to receive and carry another metal therebetween as it is cooled to solidify the same.
  • Radial is defined as radiating from the axial feed bore or axial drain bore, respectively, to the annular grooves.
  • each radial feed passageway and each radial drain passageway services two adjacent annular grooves and each casting roll has two axial feed bores and two axial drain bores which alternate in servicing the radial feed passageways and the radial drain passageways along the length of the roll.
  • Fig. 1 shows a single casting roll 10 of a roll caster of the present invention in an elevational view.
  • the casting roll is comprised of a roll 12 having a sleeve 14 over the roll 12.
  • the roll 12 has roll neck portion 16 disposed at each end thereof.
  • a portion of the sleeve 14 has been removed in Fig. 1 to show a portion of roll 12.
  • a plurality of parallel annular grooves 18 are provided in the outer surface of roll 12.
  • the parallel annular grooves 18 are evenly spaced along the length of roll 12; and, preferably, each of the grooves 18 has substantially the same dimensions.
  • Figs. 2 and 3 are cross-sections taken along lines 2-2 and 3-3, respectively, of Fig. 1.
  • the cross-sections show roll 12 with axial feed bores 20a and 20b and axial drain bores 22a and 22b preferably generally disposed about and evenly spaced around the central area of roll 12.
  • the preferred embodiment of a casting roll of the present invention shown in the drawings has two axial feed bores 20a and 20b and two axial drain bores 22a and 22b.
  • a casting roll may have one or more axial feed bores and one or more axial drain bores in other embodiments of the present invention, if appropriate.
  • the number of axial feed bores equal the number of axial drain bores in a casting roll of the present invention; and it is preferred that each of both the axial feed bores and the axial drain bores has substantially similar dimensions for length and for diameter.
  • each of both the radial feed passageways and the radial drain passageways has substantially similar dimensions for length and for diameter.
  • each radial feed passageway connects two adjacent annular grooves to an axial feed bore; and each radial drain passageway connects two adjacent annular grooves to an axial drain bore.
  • Radial feed passageway 24a and radial drain passageway 26a shown in Fig. 2 service adjacent annular grooves 18a and 18b shown in Fig. 1; and radial feed passageway 24b. and radial drain passageway 26b shown in Fig.
  • each radial feed passageway and each radial drain passageway service two adjacent annular grooves
  • each of said radial feed and radial drain passageways could service only one annular groove or could service three or more adjacent annular grooves in other embodiments of the invention, if appropriate.
  • the axial feed bores 20a and 20b alternate in servicing the radial feed passageways; and the axial drain bores 22a and 22b alternate in servicing the radial drain passageways.
  • the alternating pattern for the axial feed bores and the axial drain bores to service the radial feed passageways and the radial drain passageways, respectively, would continue along the length of roll 12.
  • annular groove 18b is indicated by dotted line 28; and annular groove 18b is not visible in this cross-section except in the general areas of the intersections of radial feed passageway 24a and radial drain passageway 26a with annular groove 18b.
  • the bottom surface of annular groove 18d is indicated by dotted line 30; and annular groove 18d is not visible in this cross-section except in the general areas of the intersections of radial feed passageway 24b and radial drain passageway 26d with annular groove 18d.
  • the arrows in Figs. 2 and 3 indicate the direction of flow of the cooling fluid.
  • Fig. 4 is a refractory top view of a portion of roll 12 of Fig. 1 showing radial feed passageway 24a servicing adjacent annular grooves 18a and 18b and radial drain passageway 26b servicing adjacent annular grooves 18c and 18d.
  • the arrows in Fig. 4 indicate the direction of flow of the cooling fluid.
  • the radial feed passageway connects to two adjacent annular grooves on the generally opposite side of roll 12 from the radial drain passageway for the same two adjacent annular grooves.
  • the radial feed passageway connects to the annular groove or adjacent annular grooves on the generally opposite side of the roll from the radial drain passageway for the same annular groove or adjacent annular grooves.
  • each radial feed passageway 24a is generally disposed on the opposite side of roll 12 from adjacent radial feed passageway 24b; and radial drain passageway 26a is generally disposed on the opposite side of roll 12 from adjacent radial drain passageway 26b.
  • each radial feed passageway extends radially outwardly from an axial feed bore in a direction generally opposite from each immediately adjacent radial feed passageway and each radial drain passageway extends radially outwardly from an axial drain bore in a direction generally opposite from each immediately adjacent radial drain passageway in the preferred embodiment or in any other embodiment of the present invention to provide the desired isothermal cooling.
  • Figs. 5 and 6 schematically show preferred flow patterns for cooling fluid through adjacent annular grooves 18a and 18b and through adjacent annular grooves 18c and 18d.
  • Fig. 5 shows the flow of cooling fluid from axial feed bore 20a through radial feed passageway 24a, adjacent annular grooves 18a and 18b and radial drain passageway 26a into axial drain bore 22a.
  • Fig. 6 shows the flow of cooling fluid from axial feed bore 20b through radial feed passageway 24b, adjacent annular grooves 18c and 18d, and radial drain passageway 26b into axial drain bore 22b.
  • the arrows indicate the direction of flow of the cooling fluid.
  • the flow of cooling fluid through each pair of adjacent annular grooves serviced by the same radial feed passageway and by the same radial drain passageway would be opposite to the flow of the cooling fluid through an adjacent pair of adjacent annular grooves serviced by an adjacent radial feed passageway and by an adjacent radial drain passageway.
  • This alternating, opposing flow pattern is achieved by alternating the placement of the radial feed passageways from generally one side of the roll to the other along the length of the roll such that each radial feed passageway extends radially outwardly from an axial feed bore in a direction generally opposite from each immediately adjacent radial feed passageway and by alternating the placement of the radial drain passageways generally from one side of the roll to the other along the length of the roll such that each radial drain passageway extends radially outwardly from an axial drain bore in a direction generally opposite from each immediately adjacent radial drain passageway, as well as by having the radial feed passageway servicing two adjacent annular grooves connect on the generally opposite side of the roll from the radial drain passageway servicing the same annular grooves.
  • the flow of cooling fluid through the annular groove or grooves, as the case may be, serviced by the same radial feed passageway and by the same radial drain passageway would be opposite to the flow of cooling fluid through the adjacent annular groove or grooves, as the case may be, serviced by an adjacent radial feed passageway and by an adjacent radial drain passageway.
  • This alternating, opposing flow pattern promotes the isothermal cooling of the casting roll's shell by providing a means for substantially uniform heat removal from the shell of the casting roll.
  • the alternating placement of the radial feed passageways and the radial drain passageways along the length of the roll allows relatively cool coolant entering the annular grooves or groove, as the case may be, to then circulate next to and opposite to relatively warmer coolant circulating through the adjacent annular grooves or groove, as the case may be, to substantially uniformly balance along the casting roll's shell the heat being transferred from the molten metal. By balancing the heat transfer in this manner, the temperature of the casting roll's shell will be substantially uniform both around the shell's circumference and across the roll's width.
  • the balancing of the heat transferred through the casting roll is also enhanced by the placement in the casting roll in accordance with the invention of the radial feed passageways carrying the relatively cool entering coolant and the radial drain passageways carrying the warmer exiting coolant.
  • a radial feed passageway carrying the cool entering coolant servicing the annular groove or grooves as the case may be, on the generally opposite side of the roll from a radial drain passageway carrying the warmer exiting coolant from the same annular groove or grooves and by having the radial feed passageways alternate with the radial drain passageways along both sides of the roll along the length of the roll, it can be seen that the cooler entering coolant flowing in the radial feed passageways substantially balances throughout the casting roll the heat flow from the warmer exiting coolant flowing in the radial drain passageways to promote substantially uniform heat distribution throughout the casting roll.
  • the balancing of the heat transferred through the casting roll is further enhanced by the use of two axial feed bores and two axial drain bores which alternate in servicing the radial feed passageways and the radial drain passageways, respectively, along the length of the roll.
  • the cooler entering coolant flowing in the axial feed bores helps to substantially balance the heat flow from the warmer exiting coolant flowing in the axial drain bores thereby assisting with the substantially uniform distribution of heat through the casting roll.
  • the present invention 's capability to substantially uniformly balance and distribute the heat being transferred from the molten metal throughout the casting roll provides substantially isothermal cooling of the casting roll's shell.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP83104755A 1982-05-17 1983-05-13 Cylindre de coulée avec un manteau refroidi isothermiquement Withdrawn EP0095111A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37891082A 1982-05-17 1982-05-17
US378910 1982-05-17

Publications (2)

Publication Number Publication Date
EP0095111A2 true EP0095111A2 (fr) 1983-11-30
EP0095111A3 EP0095111A3 (fr) 1984-02-22

Family

ID=23495042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104755A Withdrawn EP0095111A3 (fr) 1982-05-17 1983-05-13 Cylindre de coulée avec un manteau refroidi isothermiquement

Country Status (5)

Country Link
EP (1) EP0095111A3 (fr)
JP (1) JPS58209452A (fr)
AU (1) AU1422683A (fr)
CA (1) CA1208877A (fr)
NO (1) NO831747L (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001047A1 (de) * 1990-01-16 1991-10-02 Sundwiger Eisen Maschinen Giessrad mit einem auswechselbaren, angetriebenen giessring fuer eine zweiwalzen-bandgiessmaschine
EP0407978A3 (en) * 1989-07-14 1993-05-19 Hunter Engineering Company, Inc. Roll casting machine crown control
WO1995003144A1 (fr) * 1993-07-20 1995-02-02 Fata Hunter, Inc. Systeme pour machine de coulee a cylindres avec regulation du bombage
DE102011055066A1 (de) * 2011-11-04 2013-05-08 Hydro Aluminium Rolled Products Gmbh Walze mit Kühlsystem
US8647448B2 (en) 2009-03-26 2014-02-11 Federal-Mogul Burscheid Gmbh Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof
CN116571702A (zh) * 2023-05-15 2023-08-11 四川莱韦美特金属材料有限公司 一种消除气痕缺陷的槽式急冷辊及底注式急冷辊甩带装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2799399B1 (fr) * 1999-10-06 2002-02-08 Pechiney Rhenalu Cylindre de coulee continue de bande metallique comprenant un circuit de refroidissement
CN104368605A (zh) * 2014-11-19 2015-02-25 辽宁科技大学 一种适用于铸轧薄宽板带的铸轧辊冷却水道

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH429042A (de) * 1965-03-09 1967-01-31 Prolizenz Ag Walze für das Giesswalzen von Metall
US3757847A (en) * 1971-10-07 1973-09-11 P Sofinsky Roll mould with cooling system
FR2217098A1 (en) * 1973-02-13 1974-09-06 Scal Gp Condit Aluminium Continuous casting appts of improved output capacity - by lining surfaces in contact with liq metal with a highly heat conductive material eg copper (alloys)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407978A3 (en) * 1989-07-14 1993-05-19 Hunter Engineering Company, Inc. Roll casting machine crown control
US5592987A (en) * 1989-07-14 1997-01-14 Fata Hunter, Inc. System for a crown control roll casting machine
DE4001047A1 (de) * 1990-01-16 1991-10-02 Sundwiger Eisen Maschinen Giessrad mit einem auswechselbaren, angetriebenen giessring fuer eine zweiwalzen-bandgiessmaschine
WO1995003144A1 (fr) * 1993-07-20 1995-02-02 Fata Hunter, Inc. Systeme pour machine de coulee a cylindres avec regulation du bombage
US8647448B2 (en) 2009-03-26 2014-02-11 Federal-Mogul Burscheid Gmbh Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof
DE102011055066A1 (de) * 2011-11-04 2013-05-08 Hydro Aluminium Rolled Products Gmbh Walze mit Kühlsystem
EP2589446A3 (fr) * 2011-11-04 2017-08-09 Hydro Aluminium Rolled Products GmbH Rouleau avec système de refroidissement
CN116571702A (zh) * 2023-05-15 2023-08-11 四川莱韦美特金属材料有限公司 一种消除气痕缺陷的槽式急冷辊及底注式急冷辊甩带装置

Also Published As

Publication number Publication date
JPS58209452A (ja) 1983-12-06
AU1422683A (en) 1983-11-24
CA1208877A (fr) 1986-08-05
NO831747L (no) 1983-11-18
EP0095111A3 (fr) 1984-02-22

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Inventor name: RAMSER, ROBERT ALLEN